Binoculars - error corrected

Subject: Binoculars - error corrected
From: Lloyd Nielsen <>
Date: Wed, 28 Mar 2007 17:36:51 -0800
Sorry, in my earlier posting, I got multiplications and divides mixed up - it 
should have read -
"To work this out, divide the exit lens by the magnification and square it e.g. with 7x42s divide 42 by 7 which gives 6, then square it which makes 36. 10x40s gives a light value of 16 - moderate light; 16x50 gives a light value of 9.75 (not 9) - difficult in dark situations.
Thanks Tony for pointing it out.

Lloyd Nielsen
Mt Molloy  Qld


To unsubscribe from this mailing list, send the message: unsubscribe (in the body of the message, with no Subject line)

<Prev in Thread] Current Thread [Next in Thread>
  • Binoculars - error corrected, Lloyd Nielsen <=

The University of NSW School of Computer and Engineering takes no responsibility for the contents of this archive. It is purely a compilation of material sent by many people to the birding-aus mailing list. It has not been checked for accuracy nor its content verified in any way. If you wish to get material removed from the archive or have other queries about the archive e-mail Andrew Taylor at this address: andrewt@cse.unsw.EDU.AU